Hi all, what options do I have to make my E110 portable (no power plug around). I'm thinking of using those mobile powerbank but not sure about the voltage and amps. I'm not really good with electro things, so thanks for any imput. Kind Regards, Joe

Hello Joe, Your battery solution will need to supply 6 volts at up to 3 Amps of current, the same as the wall plug supplied with the E110. Higher voltages will very likely cause thermal issues on daughterboards and potentially damage. Regards, Derek On Wed, Feb 3, 2016 at 3:34 PM, Joe Y. Mambu via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi all, > what options do I have to make my E110 portable (no power plug around). > I'm thinking of using those mobile powerbank but not sure about the > voltage and amps. > I'm not really good with electro things, so thanks for any imput. > > Kind Regards, > Joe > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >

Hi Joe, Good results were achieved with both fully charged 6V lead acid batteries, and 12V lead acid batteries (read: motorcycle/car batteries), the latter being used in conjunction with 6V step-down cigarette lighter-plug voltage converters. As Derek said, 6V, and at least 3A of stable current, should be enough. Best regards, Marcus On 04.02.2016 00:34, Joe Y. Mambu via USRP-users wrote: > Hi all, > what options do I have to make my E110 portable (no power plug around). > I'm thinking of using those mobile powerbank but not sure about the > voltage and amps. > I'm not really good with electro things, so thanks for any imput. > > Kind Regards, > Joe > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

I see. I'm thinking just to take my desktop UPS to make it simple. Would that be okay? cheers, joe On Thu, Feb 4, 2016 at 1:09 PM, Derek Kozel <derek.kozel@ettus.com> wrote: > Hello Joe, > > Your battery solution will need to supply 6 volts at up to 3 Amps of > current, the same as the wall plug supplied with the E110. Higher voltages > will very likely cause thermal issues on daughterboards and potentially > damage. > > Regards, > Derek > > On Wed, Feb 3, 2016 at 3:34 PM, Joe Y. Mambu via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> Hi all, >> what options do I have to make my E110 portable (no power plug around). >> I'm thinking of using those mobile powerbank but not sure about the >> voltage and amps. >> I'm not really good with electro things, so thanks for any imput. >> >> Kind Regards, >> Joe >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >> >

 Hello Joe,

 Your battery solution will need to supply 6 volts at up to 3 Amps
 of current, the same as the wall plug supplied with the E110.
 Higher voltages will very likely cause thermal issues on
 daughterboards and potentially damage.

 Regards,
 Derek

 On Wed, Feb 3, 2016 at 3:34 PM, Joe Y. Mambu via USRP-users
 <usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>>
 wrote:

     Hi all,
     what options do I have to make my E110 portable (no power plug
     around).
     I'm thinking of using those mobile powerbank but not sure
     about the voltage and amps.
     I'm not really good with electro things, so thanks for any imput.

     Kind Regards,
     Joe

     _______________________________________________
     USRP-users mailing list
     USRP-users@lists.ettus.com <mailto:USRP-users@lists.ettus.com>
     http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

You mean plugging in the stock power converter to the grid voltage output of your UPS? Sure, that would work, but it's pretty much overkill :) Also, more expensive UPSs don't have that problem normally, but be aware that high-current switch-mode power supplies like those found in UPSes do tend to emit a bit of HF. Maybe you want to measure the effect of operating on the UPS vs. without it first. So: I might be a bit of a tinkerer at times, but I'd try the following: 1. Get a lithium power tool accumulator and a charger. That might mean you'd have to visit a DIY store, or just use the electrical screwdriver you've got lying around. Look for one that has 7.2V and is lithium. Alternatively, get a accumulator pack for RC cars, or just a 7 pack battery holder for the NiMh accumulator size of your choice; point is that NiMH has a sharper decline of Voltage over discharge. 2a. Get a linear regulator. They are dirt cheap, and something like the Texas Instruments LM1084 / ST LD1084 can be had as free sample most easily within days. In the case of that specific IC (but others, too), it's adding about four discrete components on a breadboard, and the datasheet tells you which ones these are :). I did this for this particular IC, but if you decide to order a different one, make sure that according to its datasheet, V_in - V_dropout(3A) >= 6V; or: 2b. get better efficiency by using a switched DC/DC converter; TI sells those complete as "Power Modules", with which you can step down with little losses, and still get the same ease of configuration as with a linear regulator (but don't actually convert the Voltage you don't need, which actually is Joule per electron, to heat). Make sure you appropriately filter the output -- large enough capacitors should do. I didn't look into those to extensively, but maybe you'll also find something available a free sample[2]. Then, use any power source that fits into the typically large input voltage range. Car battery, pack of NiMHs, LiIon power tool accumulators... Best regards, Marcus [1] http://www.ti.com/product/LM1084/samplebuy [2] http://www.ti.com/general/docs/datasheetdiagram.tsp?genericPartNumber=LMZ22005&diagramId=28480 On 04.02.2016 10:10, Joe Y. Mambu via USRP-users wrote: > I see. I'm thinking just to take my desktop UPS to make it simple. > Would that be okay? > > cheers, > joe > > On Thu, Feb 4, 2016 at 1:09 PM, Derek Kozel <derek.kozel@ettus.com > <mailto:derek.kozel@ettus.com>> wrote: > > Hello Joe, > > Your battery solution will need to supply 6 volts at up to 3 Amps > of current, the same as the wall plug supplied with the E110. > Higher voltages will very likely cause thermal issues on > daughterboards and potentially damage. > > Regards, > Derek > > On Wed, Feb 3, 2016 at 3:34 PM, Joe Y. Mambu via USRP-users > <usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>> > wrote: > > Hi all, > what options do I have to make my E110 portable (no power plug > around). > I'm thinking of using those mobile powerbank but not sure > about the voltage and amps. > I'm not really good with electro things, so thanks for any imput. > > Kind Regards, > Joe > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com <mailto:USRP-users@lists.ettus.com> > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com